Here is the problem:Find the domain and range of this piecewise defined function;f(x)= -2x^2 with restriction x greater than or equal to -2 and less than 1 -0.5 with restriction x=1 x with restriction x greater than 1

After graphing the piecewise functions, I determined that the domain = [-2, positive infinity]and the range = [-8, 0] U (1, positive infinity]. The textbook has the answer D= [-1, positive infinity] and R= [-2, positive infinity].Can someone please help me verify which answer is correct? Or maybe their both wrong? Thanks